2015 Seat Leon SC check engine

Instruments and warning/control lamps
Depending on the model, additional text
me s
s
ages may be viewed on the instrument
panel display. These may be purely informa-
tive or they may be advising of the need for
action ››› page 104, Instruments.
Depending upon the equipment fitted in the
vehicle, instead of a warning lamp, some-
times a symbol may be displayed on the in-
strument panel.
When certain control and warning lamps are
lit, an audible warning is also heard. WARNING
If the warning lamps and messages are ignor-
ed, the v ehic

le may stall in traffic, or may
cause accidents and severe injuries.
● Never ignore the warning lamps or text
mess
ages.
● Stop the vehicle safely as soon as possible.
● Park the vehicle away from traffic and en-
sure th
at there are no highly flammable ma-
terials under the vehicle that could come into
contact with the exhaust system (e.g. dry
grass, fuel).
● A faulty vehicle represents a risk of acci-
dent for the driv
er and for other road users. If
necessary, switch on the hazard warning
lamps and put out the warning triangle to ad-
vise other drivers.
● Before opening the bonnet, switch off the
engine and al
low it to cool. ●
In any

vehicle, the engine compartment is a
hazardous area and could cause severe inju-
ries ››› page 246. CAUTION
Failure to heed the control lamps and text
me ss

ages when they appear may result in
faults in the vehicle. Engine management*
 This warning lamp monitors the engine man-
ag
ement
sy

stem for petrol engines.
The warning lamp  (Electronic Power Con-
trol) lights up when the ignition is switched
on while system operation is being verified. It
should go out once the engine is started.
If there is a fault in the electronic engine
management system while you are driving,
this warning lamp will light up. Stop the vehi-
cle and seek technical assistance.
Engine pre-heating/fault system* The warning lamp lights up to show that the
glo
w p
lug

s are preheating the diesel engine.
The control lamp  lights up
If the control lamp  lights up when the en-
gine is started it means that the glow plugs are preheating. When the warning lamp goes
off, the engine shou

ld be started straight
away.
Control lamp  flashes
If a fault develops in the engine management
system while you are driving, the glow plug
system lamp will flash . Take the vehicle to
a specialised workshop as soon as possible
and have the engine checked. 109
Technical data
Advice
Operation
Emergencies
Safety

Opening and closing
Safety switch * (only
in 5-door vehicles)
Safety switch 5 on the driver door can be
u sed t
o di

sable the electric window buttons
in the rear doors.
Safety switch not pressed: buttons on rear
doors are activated.
Safety switch pressed: buttons on rear doors
are deactivated.
The safety control symbol  lights up in yel-
low if the buttons on the rear door are switch-
ed off. WARNING
Observe the safety warnings ›››
in Intro-
duction on pag e 88
.
● Incorrect use of the electric windows can
res
ult in injury.
● Never close the rear lid without observing
and ensurin
g it is clear, to do otherwise could
cause serious injury to you and third parties.
Make sure that no one is in the path of a win-
dow.
● The engine may accidentally be started and
be out of c
ontrol.
● If the ignition is switched on, the electric
equipment cou
ld be activated with risk of in-
jury, for example, in the electric windows.
● The doors can be locked using the remote
contro
l key. This could become an obstacle
for assistance in an emergency situation. ●
Alw a

ys take the key with you when you
leave the vehicle.
● The electric windows will work until the ig-
nition has
been switched off and one of the
front doors has been opened.
● If necessary, use the safety switch to disa-
ble the r
ear electric windows. Make sure that
they have been disabled. Note
If the window is not able to close because it
i s s

tiff or because of an obstruction, the win-
dow will automatically open again
››› page 125. If this happens, check why the
window could not be closed before attempt-
ing to close it again. Roll-back function
The roll-back function reduces the risk of in-
jur
y
when the el

ectric windows close.
● If a window is obstructed when closing au-
tomatic
ally, the window stops at this point
and lowers immediately ››› .
● Next, check why the window does not close
bef or
e att

empting it again.
● If you try within the following 10 seconds
and the window c
loses again with difficulty
or there is an obstruction, the automatic clos-
ing will stop working for 10 seconds. ●
If the windo
w is still obstructed, the win-
dow will stop at this point.
● If there is no obvious reason why the win-
dow cannot
be closed, try to close it again by
pulling the tab within ten seconds. The win-
dow closes with maximum force. The roll-
back function is now deactivated.
● If more than 10 seconds pass, the window
wil
l open fully when you operate one of the
buttons. One-touch closing is reactivated. WARNING
Observe the safety warnings ›››
in Opening
and clo s
ing of the electric windows* on
page 125.
● The roll-back function does not prevent fin-
gers
or other parts of the body getting
pinched against the window frame. Risk of
accident. Convenience opening/closing
Use the convenience opening/closing func-
tion t
o e
a

sily open/close all the windows and
the sliding/tilting sunroof* from the outside.
Convenience open function
– Press and hold button  on the remote
c ontr
o

l key until all the windows and the
sliding/tilting sunroof* have reached the
desired position, or »
125
Technical data
Advice
Operation
Emergencies
Safety

Transport and practical equipment
– Att ac
h the s
traps to the rear lid A
› ›› .
WARNING
● The lugg ag

e compartment cover must al-
ways be fixed properly (risk of accident).
● The luggage compartment cover should not
be used as
a storage shelf. Articles placed on
this cover could cause injury to vehicle occu-
pants in an accident or if the brakes are ap-
plied suddenly. Retractable rear shelf
3 App
lies to the model: LEON ST Fig. 160
In the luggage compartment: Rear
shelf . Fig. 161
In the luggage compartment: remov-
ing the r e

ar shelf. Retracting the rear shelf
● Press the release catch of the rear shelf
(pr e
s

s) until it is released ››› Fig. 160 1 . The
shelf w
i
ll automatically move towards the
end and will retract completely.
Opening the rear shelf
● Pull the unfolded shelf evenly backwards.
Remov
ing the rear shelf
● Press the support of the rear shelf
›››
Fig. 161 1 in the direction of the arrow.
● Remove the rear shelf through the support
and up w
ar

ds.
● The rear shelf can be stored under the lug-
gage c
ompartment variable floor when the
latter is in the top position (except for vehi-
cles equipped with natural gas engine CNG)
››› page 150. Fitting the rear shelf
● Place the rear shelf in the housing provided
in the left
side cover.
● Engage the support of the rear shelf
›››
Fig. 161 1 in the right housing.
● Check that the support ››
›
Fig. 161 1 is
pr operly
en
gaged. WARNING
Animals, loose or unsecured or objects car-
ried on the re ar shelf

can cause serious injury
in case of sudden manoeuvring or braking or
in case of an accident.
● Do not leave hard, sharp or heavy objects
or in bags
on the rear shelf.
● Never carry animals on the rear shelf. 149
Technical data
Advice
Operation
Emergencies
Safety

Operation
WARNING
Reduced visibility through the windows in-
cr e
ases the risk of serious accidents.
● Always ensure that all windows are free of
ice and sno
w, and that they are not fogged,
so as to maintain good visibility of everything
outside.
● The maximum heat output required to de-
fros
t windows as quickly as possible is only
available when the engine has reached its
normal running temperature. Only drive when
you have good visibility.
● Always ensure that you use the heating
syst
em, fresh air system, air conditioner and
the heated rear window to maintain good visi-
bility to the outside.
● Never leave the air recirculation on for a
long period of time. If
the cooling system is
switched off and air recirculation mode
switched on, the windows can mist over very
quickly, considerably limiting visibility.
● Switch air recirculation mode off when it is
not requir
ed. WARNING
Stuffy or used air will increase fatigue and re-
duce driv er c

oncentration possibly resulting
in a serious accident.
● Never leave the fresh air fan turned off or
use the air rec
irculation for long periods of
time; the air in the vehicle interior will not be
refreshed. CAUTION
● Swit c

h the air conditioner off if you think it
may be broken. This will avoid additional
damage. Have the air conditioner checked by
a specialised workshop.
● Repairs to the air conditioner require spe-
cia
list knowledge and special tools. SEAT rec-
ommends visiting a SEAT Official Service. Note
● When the coo lin

g system is turned off, air
coming from the outside will not be dried. To
prevent fogging of the windows, SEAT recom-
mends leaving the cooling system (compres-
sor) turned on. To do this, press the button  . The button lamp should light up.
● The maximum heat output required to de-
fro s

t windows as quickly as possible is only
available when the engine has reached its
normal running temperature.
● Keep the air intake slots in front of the
winds
creen free of snow, ice and leaves to en-
sure heating and cooling are not impaired,
and to prevent the windows from misting
over. Adjust using the Easy Connect sys-
t
em* 3 Applies to vehicles with a Touch/Colour Media
S y

stem.
In the Easy Connect system it is also possible
to perform various adjustments to the Clima-
tronic.
Open the air conditioner menu
● Press the Setup button.
● OR: press the MENU button in Easy Con-
nect. W

ith the rotating switch select the air
conditioner menu and open it.
On the touch screen you can see and change
the current settings, for example, the temper-
ature set for the driver and passenger sides,
the air distribution and the fan speed. With
button  the driver and passenger side
t emper
at

ures are synchronised ›››
Book-
let Media System Touch/Colour, chapter Air
conditioning.
To switch a function on or off, or to select a
submenu, you must press the corresponding
function button.
For more information about functions
››› page 110.
160

Operation
Exhaust gas filtration systems Catalytic converter
App
lie
s to vehicles with petrol engine: the
vehicle must only be used with unleaded pet-
rol, otherwise the catalytic converter will be
irreparably damaged.
Never drive until the tank is empty; an irregu-
lar supply of fuel can cause faulty combus-
tion. In these cases, unburned fuel reaches
the exhaust system, which can overheat and
damage the catalytic converter.
Diesel particulate filter
Applies to vehicles with diesel engine: the
diesel engine particulate filter eliminates
most of the soot from the exhaust gas sys-
tem. Under normal driving conditions, the fil-
ter cleans itself. The diesel particulate filter is
cleaned automatically without need for indi-
cation by the warning lamp . This may be
noticed because the engine idle speed in-
creases and an odour may be detected.
If automatic filter purification cannot be car-
ried out (because only short trips are taken,
for example), soot will accumulate on the fil-
ter and the Diesel particulate filter warning
lamp will  switch on.
Facilitate the automatic filter cleaning proc-
ess by driving in the following manner: drive
for approximately 15 minutes at a minimum
speed of 60 km/h in 4th or 5th gear (auto- matic gearbox: gear S). Maintain the engine
speed at
ap

proximately 2,000 rpm. The rise
in temperature causes the soot on the filter
to burn. On completion of the cleaning the
warning lamp will switch off. If the warning
lamp does not switch off, go immediately to a
specialised workshop to rectify the problem. WARNING
● Bec au

se of the high temperatures which
can occur in the exhaust gas control system
(catalytic converter or diesel particulate fil-
ter), do not park the vehicle where the ex-
haust can come into contact with flammable
materials under the car (e.g. on grass or at
the forest edge). Fire hazard!
● Do not apply wax underneath the vehicle
around the ar
ea of the exhaust system: Fire
hazard! Driving through flooded roads
To prevent damage to the vehicle when driv-
in
g thr
ough w

ater, for example, along a floo-
ded road, please observe the following:
● The water should never come above the
lower edg
e of the bodywork.
● Drive at pedestrian speed. WARNING
After driving through water, mud, sludge,
etc ., the br

aking effect can be delayed slight-
ly due to moisture build-up on the discs and
brake pads. Applying the brakes carefully
several times will remove the moisture and
restore the full braking effect. CAUTION
● Drivin g thr

ough flooded areas may severely
damage vehicle components such as the en-
gine, transmission, running gear or electrical
system.
● Whenever driving through water, the Start-
Stop sys
tem* must be switched off
››› page 183. Note
● Check the depth of

the water before enter-
ing the flooded zone.
● Do not stop in the water, drive in reverse, or
stop the en
gine in any situation.
● Note that vehicles travelling in the opposite
direction ma
y splash water that could exceed
the maximum permitted water height for your
vehicle.
● Avoid driving through salt water (corro-
sion). 176

Operation
A cold engine consumes a disproportionate
amou nt
of
fuel. The engine reaches its work-
ing temperature after about four kilometres
(2.5 miles), when fuel consumption will re-
turn to a normal level.
Check tyre pressure
Always make sure the tyres are inflated to the
correct pressures ››› page 256 to save fuel. If
the pressure is below half bar, fuel consump-
tion may increase by 5%. Due to the greater
rolling resistance, under-inflation also increa-
ses tyre wear and impairs handling.
Do not use winter tyres all year round as they
increase fuel consumption by up to 10%.
Avoid carrying unnecessary loads
Given that every kilo of extra weight will in-
crease the fuel consumption, it is advisable
to always check the luggage compartment to
make sure that no unnecessary loads are be-
ing transported.
Since the luggage rack increases the aerody-
namic drag of the vehicle, you should remove
it when not needed. This will save, at a speed
of 100-120 km/h (60-75 mph), 12% of fuel.
Save electrical energy
The engine drives the alternator, thereby gen-
erating electricity. This implies that any in-
crease in power consumption also increases
fuel consumption! For this reason, switch off any unneeded electrical devices. Devices that
use a lot of
electricity includes the blower at
a high setting, the rear window heating or
the seat heating*. Driver assistance systems
Br ak
in
g and stability systems
Electronic Stability Control (ESC) The ESC helps to improve safety. It reduces
the tendency
t

o skid and improves the stabil-
ity and roadholding of the vehicle. The ESC
detects critical handling situations, such as
vehicle understeer or oversteer, or wheelspin
on the driving wheels. It stabilises the vehi-
cle by braking individual wheels or by reduc-
ing the engine torque. The warning lamp will
flash on the instrument panel when the ESC
is intervening .
ESC includes the Anti-lock brake system
(ABS), the brake assist system, the traction
control system (ASR), electronic differential
lock (EDL), electronic self-locking*, selective
torque control* and tractor-trailer sway miti-
gation*. ESC also helps stabilise the vehicle
by changing the torque.
Anti-lock brake system (ABS)
ABS prevents the wheels from locking up un-
der braking until the vehicle has reached a
virtual standstill. You can continue to steer
the vehicle even when the brakes are on full.
Keep your foot on the brake pedal and do not
pump the brakes. You will feel the brake ped-
al pulsate while the ABS is working.
178

Operation
Note
● If the A C
C system does not work as descri-
bed in this chapter, do not use it until it has
been checked by a specialised workshop.
SEAT recommends visiting a SEAT dealership
for this purpose.
● Maximum speed with the ACC activated is
limited to 160 km/h (100 mph).
● When the A

CC is switched on, strange
noises
may be heard during automatic brak-
ing cause by the braking system. Indications on the display, warning
and indic
ation l
amp

s Fig. 194
On the instrument panel display: (A)
A C
C

temporarily inactive, vehicle detected in
front, temporary distance adjusted. (B) ACC
active, vehicle detected in front, temporary
distance adjusted. Status display
Indic
ation
s

on the display ››› Fig. 194:
Vehicle in front, the ACC is inactive.
1 Distance margin selected, the ACC is in-
activ
e.
V ehic

le detected in front. The ACC is ac-
tive.
Adjustment of the temporary distance
from the vehicle in front with a program-
med speed.
Temporary distance adjustment from the
vehicle in front with a programmed
speed.
Warning and indication lamps
››› in Warning and indication lamps on
p ag
e 109

. 
The speed reduction by the ACC to
maintain the distance from the vehi-
cle in front is not sufficient.
Brake! apply the foot brake! Driver intervention prompt.

The ACC is not currently available.
a)
With the vehicle stationary, switch off the engine and
start it up again. Check the radar sensor visually for dirt,
ice or knocks. If it is still unavailable, refer to a special-
ised workshop to have the system inspected.
a)
The symbol on the instrument panels with colour display is in
colour.
2 3
4
5
188

Towing bracket device
Trailer towing Wh at
do
you need to bear in mind
when towing a trailer? Your vehicle may be used to tow a trailer
when fitted w
ith the c

orrect equipment.
If you wish to retrofit a towing bracket, con-
sult ››› page 228.
Connectors
Your vehicle is fitted with a 13-pin connector
for the electrical connection between the
trailer and the vehicle.
If the trailer has a 7-pin plug you will need to
use an adapter cable. It is available at any
Technical Service.
Trailer weight/drawbar load
Never exceed the authorised trailer weight. If
you do not load the trailer up to the maxi-
mum permitted trailer weight, you can then
climb correspondingly steeper slopes.
The maximum trailer weights listed are only
applicable for altitudes up to 1000 m above
sea level. With increasing altitude the engine
power and therefore the vehicle climbing
ability are impaired because of the reduced
air density. The maximum trailer weight has
to be reduced accordingly. The weight of the
vehicle and trailer combination must be re- duced by 10% for every further 1000 m (or
par
t

thereof). The gross combination weight
is the actual weight of the laden vehicle plus
the actual weight of the laden trailer. When
possible, operate the trailer with the maxi-
mum permitted drawbar load on the ball joint
of the towing bracket, but do not exceed the
specified limit.
The figures for trailer weights and drawbar
loads that are given on the data plate of the
towing bracket are for certification purposes
only. The correct figures for your specific
model, which may be lower than these fig-
ures for the towing bracket, are given in the
vehicle documentation or in ››› chapter Tech-
nical Data .
Distributing the load
Distribute loads in the trailer so that heavy
objects are as near to the axle as possible.
Loads carried in the trailer must be secured
to prevent them moving.
Tyre pressure
Set tyre pressure to the maximum permissi-
ble pressure shown on the sticker on the in-
side of the fuel tank flap. Set the tyre pres-
sure of the trailer tyres in accordance with the
trailer manufacturer's recommendations. Exterior mirrors
Check whether
you can see enough of the
road behind the trailer with the standard rear
vision mirrors. If this is not the case, you
should have additional exterior mirrors fitted.
Both exterior mirrors should be mounted on
hinged extension brackets. Adjust the mirrors
to give sufficient vision to the rear.
Tow rope
Always use a cable between the vehicle and
the trailer ››› page 226.
Trailer rear lights
The trailer's rear lights should comply with
the statutory safety regulations ››› page 226. WARNING
Never transport people in a trailer. This could
re s

ult in fatal accidents. Note
● To w

ing a trailer places additional demands
on the vehicle. We recommend additional
services between the normal inspection inter-
vals if the vehicle is used frequently for tow-
ing a trailer.
● Find out whether special regulations apply
to to
wing a trailer in your country. 225
Technical data
Advice
Operation
Emergencies
Safety